DH40FR 1-9/16 Inch Spline Shank Rotary Hammer, 2-Mode, EVSThe DH40FR Rotary Hammer features a drilling speed that is 10% faster than similar products, while at the same time, produces lower vibration and noise levels than other tools in its class. With an increase in performance, operability and durability the DH40FR takes rotary hammers to a new level.